Multiple vulnerabilities in Mozilla products (July 22, 2026)
Multiple vulnerabilities have been discovered in Mozilla products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation, and a remote denial of service.
CSIRTS triage
- What
- Multiple vulnerabilities in Mozilla products could allow remote arbitrary code execution, privilege escalation, and denial of service.
- Who is affected
- Users of Mozilla products.
- Urgency
- Remediation is critical due to the potential for severe security impacts.
- Action
- Update to the latest version of Mozilla products.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0910/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-163540.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
- Low exploitation riskCVE-2026-163590.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
- Low exploitation riskCVE-2026-157190.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all scored CVEs.
- Low exploitation riskCVE-2026-164090.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.
- Low exploitation riskCVE-2026-164040.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.
- Low exploitation riskCVE-2026-163730.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all scored CVEs.
- Low exploitation riskCVE-2026-163860.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all scored CVEs.
- Low exploitation riskCVE-2026-163770.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
- Low exploitation riskCVE-2026-163570.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all scored CVEs.
- Low exploitation riskCVE-2026-163870.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
Referenced CVEs
+12 more CVEs referenced in this advisory.
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Mozilla Firefox and Firefox ESR: Multiple vulnerabilitiescert-bund
- medium[NEW] [medium] Mozilla Firefox: Multiple vulnerabilities allow unspecified attackcert-bund
- unknownDSA-6403-1 nss - security updatedebian
- unknownMultiple vulnerabilities in Mozilla Thunderbird (July 23, 2026)cert-fr-avis
- unknownMozilla Products Multiple Vulnerabilitieshkcert
- unknownDSA-6394-1 firefox-esr - security updatedebian
- criticalCVE-2026-16412: Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed ev…nvd
- criticalCVE-2026-16410: JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Fi…nvd
- highCVE-2026-16409: Invalid pointer in the Security: PSM component. This vulnerability was fixed in Firefox 153 an…nvd
- criticalCVE-2026-16408: Integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firef…nvd
- criticalCVE-2026-16407: Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firef…nvd
- criticalCVE-2026-16406: Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and…nvd
Recent advisories for Mozilla products
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- unknownMozilla Products Multiple Vulnerabilitieshkcert · 2026-07-22
- unknownMozilla Products Multiple Vulnerabilitieshkcert · 2026-07-15
- unknownMozilla Products Multiple Vulnerabilitieshkcert · 2026-07-02
- criticalexploitedCVE-2010-3765: Mozilla Multiple Products Remote Code Execution Vulnerabilitycisa-kev · 2025-10-06
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